A Wideband OAM Antenna Based on Chiral Harmonic Diffraction

An orbital angular momentum (OAM) antenna based on chiral harmonic diffraction of spoof surface plasmon polaritons (SSPP) is demonstrated in this letter. Due to the diffraction of the helical wire, SSPP is transformed into the high-purity OAM mode. The operation frequency is determined by SSPP, and...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2021-12, Vol.20 (12), p.2290-2294
Main Authors: Zhu, Juan-Feng, Du, Chao-Hai, Sha, Wei E. I., Zhang, Zi-Wen, Gao, Zi-Chao, Li, Fan-Hong, Liu, Pu-Kun
Format: Article
Language:English
Subjects:
Angular momentum
Antennas
Couplers
Diffraction
Dispersion
Gratings
Harmonic analysis
Helical antennas
Helical wire
leaky-wave antenna
orbital angular momentum (OAM)
Polaritons
spoof surface plasmon
vortex beam
Wireless communications
Wires
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Summary:An orbital angular momentum (OAM) antenna based on chiral harmonic diffraction of spoof surface plasmon polaritons (SSPP) is demonstrated in this letter. Due to the diffraction of the helical wire, SSPP is transformed into the high-purity OAM mode. The operation frequency is determined by SSPP, and the topological charge is manipulated by modulating the harmonic order. Additionally, this system achieves a frequency-controlled beam-scanning characteristic in a wide bandwidth from 7.8 to 12.6 GHz, and the measurement data agrees well with the theoretical analysis and the simulation results. Furthermore, the OAM antenna validated in this letter is compact, easy-fabricated, and robust.The underlying principle opens up a new train of thought for generating OAM mode and paves the versatile applications involving wireless communication.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2021.3108553